施工过程中，各种原材的检测报告、合格证、复试报告应一证一试作为一份材料，不得（）装订

下列各组离子在溶液中一定能够大量共存的是（　　）

A．在含有大量OH^-的溶液中：NO₃^-、Na⁺、Cl^-、AlO

B．在强酸性溶液中：Na⁺、K⁺、CO₃^2-、SO₄^2-

C．在含有大量SO₄^2-的无色溶液中：Mg²⁺、Na⁺、MnO₄^-、Cl^-

D．在含有大量Fe²⁺的溶液中：H⁺、Na⁺、Cl^-、NO

短文改错（每小题1分，满分10分）

文章共有10处语言错误，要求你在错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏字符号（∧），并在其下面写上该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

注意：1．每处错误及修改词均仅限一词；

2．只允许修改10处，多者（从11处起）不记分。

As an English beginner, I found difficult to read fast. It was because whenever I read I always try to translate every English word or sentence into Chinese after I could understand it. As a result of, it usually took me over 10 minutes to finish read a passage. To get it over, I read a lot. Firstly, you read the passage fast and answered the questions within six minutes. Secondly, I checked the answer to see which of them were wrong. Then I look up only those key new words to seeing why they were wrong. By this way, I have improved my reading speed a lot.

“农为天下之本务.而工贾皆其末也”,与雍正这句话的观点不一致的是( )

A上农除末，黔首是富

B乃令贾人不得衣丝乘车，重租税以困辱之

C世儒不察，以工商为末，妄议之

D禁商贩，倡优下贱不许服用貂裘

如图所示，理想变压器原线圈连接的交变电压有效值保持不变，L₁，L₂是完全相同的两个灯泡，电表均为理想电表，开始时开关S是闭合的，当开关S断开后，下列说法正确的是（　　）

A．电压表的示数变大

B．电流表A₁的示数减小

C．电流表A₂的示数变大

D．灯泡L₁的亮度变亮

按照《电气装置安装工程高压电器施工及验收规范》规定，串补平台金属构件安装前检查，应无变形、锈蚀、热镀锌质量良好